34 CIRCULAR 2 51, U. S. DEPARTMENT OF AGRICULTURE 



means of turning the manure and filling the houses are evidently 

 too small to give the large-scale producer much advantage over the 

 smaller grower who is able to maintain a high average yield by 

 personal attention to essential details. On the other hand, it is ap- 

 parent that a mushroom plant must have 40,000 to 50,000 square feet 

 of bed surface before wages of management can be expected even 

 by an experienced grower. Under conditions prevailing in 1930 a 

 plant of this size represented an investment of from $15,000 to 

 $20,000. 



